Machine for cleaning tire cores



Oct. 12, 1926;

1,603,249 w. c. STEVENS I MACHINE FOR CLEANING TIRE OORES Filed Jan. 9.1922 8 Sheets$heet 1 Oct. 12 1926.

' w. c. STEVENS MACHINE FOR CLEANING TIRE CORES Filed Jan. 9, 1922B-SheetS-Sheet 21 oct. 12, 1926 I 1 1 1,603,249

- W. STEVENS MACHINE FOR CLEANING TIRE co'REs Filed Jan. 9'. 1922 8Sheets-Sheet 4 Oct.

w. c. STEVENS HACHINE FOR CLEANING TIRE coRE s- Filed Jan. 9, 1922 Yak?8 Sheets-Sheet 5' w. G. STEVENS I MACHINE FOR CLEAN INF: TIRE CORES Filed Jan. 9, 1922 8 sheet-shet e Jude/70557 M776 56309766 @ECW Qct.12,1926, 1",eo3,249

w. c. STEVENS I r MACHINE FOR CLEANING TIRE coREs I Filed Jan. 9, 1922 8Sheets-Sheet 7 I I l I w. c. STEVENS 'MACHINE FOR CLEANING TIRE CORES IFiled Jan. 9, 1922 8 Sheets-Sheet 8 Patented a. 12, 1926.. P

v WILL'IAM e vmmr mmoimonm nssmnpieircq HE fim esmeimmmn Anni RUB? y P FF H WA J E NQOE; acme 2 MAQHIN QFQRecnmmmesummons;

n ucatiomfiiea January; 9,1922.) SerialNd.1527,82eQQ'L In ;the.lnanufzicturermofz.fpneumetici tires 2 are verticelebracketspruprights14,whichjjfi the cores upon which the; tires iaiielbuilt are;

thejecore in the prpcesspf.shtipingtheiabric. After vulcanization, the;ruhben ,adhe'res to the .coire ,andbefore. a fresh the. can ebeibuiltthereon, the core"must,he;-c1e2 ned--Qthe;ad

hering pa rticles oiluhh'r;

' Machines:hweybeenudesigned for the, per-v.

pese pf; reinoying these, perticles of iuhhei', and 1, the object.oith,presentginyention is;t0

. iI'IiPIT OVB HPOII niachinesgfoi' thijs-jworlglhsethzitthemachinezwill .iitito'lnat-ically'clezinthe e cores and theiworkmay be clone-meme rapidly;

and'be'tter than thema'chines 'ofjthpriot art ithout any manuelilabororfsuper in tendencewhatever. r

adinitting. a freshicore to take its p1ace.

1n'achine..,v

ori-thel-ine 6 ,-6 of Fig. 5.

7 is. a similarwiew on.r .line,'77 of Fig. 5

an smfl, y e v.. 4

Fig. 9 is'a detail of the latching nech anisnn, v U V 1 T11e,-nu era1, 1represents theside frames ofthe'rna'chine, which are, supported uponjabz'lsefplete 2 and connected bye t p plet-e 3,

which carries the I drii ing end control devicsfoi thmachineY Attachedto the base cores t he coref-suppenting gen d rotating cradle, indicated1n vgeneral, byfl thegnume e l In the .clrewings accompenyingwthis applicationis shown Oneifoiinof machineflfoia jack complishing: the resultsfdesiredfbut it" Will 1. be. undetstood that the. scheming is ".efor;the; purposeof eihabl'ingkilone skilled :in the" 21 mm pl actise, :theinyention, j end I L am not. re-.. strjicted ftol confoi'mity'with!details {01vv 211: l a-ngelnent, 'of. parts in fcll'ciiwing the}invene. f

Fig.4 is a side elevationgfa machine con-Q lar mew. but with jpartsf,

Fig jfijs alongitudinal.sectiohaLView of the ,top. ioftthe HlflChlIlB,the View belng taken Fig'. 8 is a detail Ofthe releasirigimebh-- supporta trough 01' inclined nlnw ay T5,, fdQW v giyene coatingi pf :fubb encement on" their; lower-sidewalls; ,in ,orde'rltb ohtain adherence V 5of the yskii'ts :Or. edges-Of ithc fabr'ic "plies-.350.

which the cores r011 iniltheirnpasslag ez hrough? the ma-ch1ne, therunwayf deliizering the;

6, which "in turn dischargestheQcOnes tOQan inclined fdischargernnyvayf7."f Extending thi oughfi fmachi ie ebcye ihQEI'UIlWflYE are; perallel' guide 'barsj8,'gattach to the-1110p 1'.

sion of'thc core being bygi'avity ihg erad lej 6 be ng arranged and-aaptedito'zdete npt particles of 'ceinent and t lift;v J

A core. entei's the mac i'ne on 'theq ight 01?]75 Fig; being flelivereelfi'gm the tilfesti ipg ping device; and it1011sthifotighgthmachine; andl'inless'stcpped hyde ing'rneansto'xbe described latex-{it t isjreceiyedjn'jthe cnadle 6 being stopped by a biimpenjlltj This @0111;g-sn pri s b y;i ui abl meteli a .prflfr'l; eraqbl'y hardwqo d Which isiviot e'll-yi me int-v ed, 'bnma shaft'l2 carified lin brecl zets 13formed, on-the realiQfthe c1" s s b ace lO; As the bumper 'hengsjts'lbwenendis in the; peth of the oncoming core being. preventedfrcmiockingdownwer'd b y' aifinge r .lfigf which beersegejnstthelqwerjeidenf the crossbra'ce lO'; 'A plqqjecting' plate 15 limits theupward 'mpve nentfqf. thlbtiinpe r in a, menneir to be described]? I thecore, omp is ea Jeeneltally, epe -i amei orkilerwhi i piv tecl bn a hit; '7

ing the greater portion of the operation of the machine, the lever 31 isso held that the cradle will be horizontal, but at stated intervals itis released momentarily to discharge the core. The mechanism forperforming this function will be described later.

Pivotally mounted on brackets 33 and 35 are swinging arms or frames 34each of which extends on one side of the core as it rests in the cradle,and each of which carries at its lower end a rotary'shaft 36 on the endsof which are mounted two brushes 360 so located as to be opposite thatportion of the core which it is desired to clean. The shaft 36 on eachside of the core carries a pulley 37 by which it is rotated in a mannerto be described.

Passing through each bracket 34 near the lower end is a screw threadedbar 38, the

. end of which is adjustably received in a be described with the controlmechanism on,

the top plate.

On the top plate 3 is secured the motor 43, which, through a belt 44,rotates a pulley 45 on the end of the main drive shaft 46 which ismounted for vertical adjustment in brackets 47 and 48 on the top plate.On the shaft 46 are secured pulleys 49, over which are trainedvbelts 50that pass through an aperturein the top plate and over pulleys 37, sothat the brushes are continuously rotated.

To the shaft 46 is secured a sprocket 51 over which passes a chain 52 toa sprocket 53, which is mounted on the shaft 54 and connected therewithfor driving relation by any suitable form of friction drivingconnection, such as illustrated, for example, at

55. This friction drive is provided to permit slippage should anyportion of the machine j am and thus prevent breakage of the machine.

On the end of the shaft 54 is carried a pinion 56 which meshes with agear 57 rotatably supported in a bracket 58 secured to the top plate,the gear carrying a sprocket 59 over which the chain 29 is trained,which chain drives the cradle rollers.

The'shaft'54 at the end remote from the pinion 56 carries a worm 60which meshes with a worm gear 61 keyed to the end of a shaft 62extending longitudinally of the top plate in a bracket 63 and in thebracket 48. The shaft 62 is'intended to carry twoo-ne-revolution-and-stop clutches of any preferred type, one of which isdesignated position to be ready to disengage the clutch as it finishesone revolution. This type of The clutch 65 is secured to a sleeve 74rising from the top plate. At a midway point of the shaft 73 is a cam 75 which opens and closes the brushes 360 and raises and lowers thecradle 6. The cam is provided with raised flange or ring 76 cut awayover a short distance, the ring bemg designed to contact rollers 77 onthe upper ends of the arms 42, the brushes being drawn together byrocking movement of the frames 34 imparted through the levers 42 andspread apart when the rollers reach the gap in the rlng.

The periphery of the cam is provided with anotch 78 and the end of thelever 31 carries a roller 79 which rides over the periphery of the cam.lVhen the roller reaches the notch the cradle is lowered as shown inFig. 4 and the core is discharged. The gap in the ring 76 and the notch78 are located at the same part of the cam so that the dis charge of thecore will occur while the brushes are spread. The clutch 65 is soarranged that it will stop just after the cradle is raised and while thebrushes are spread thus leaving the parts in position to receive a freshuneleaned core.

At this point it will be noted that bumper 11 is so designed andpivotedthat it will stop a core rolling down the incline 5, but

if the core which has been cleaned is prevented from leaving the cradle,as by a jam of cores in the runway 7 when the cradle h teotedi 1 asshown in Fin. 4

is lifted the buniper -wi l1irock onithenpivot 12c and this part of theniacliinenvilllbe m Thevclutch whichoperates the cain s conne'etedordisconnected by the finger 69 ke yecl on *a ,shaft 80, extending trans--versel yot the"v top plate andinounted in bearings 81; Onathe end ofthe shaityrein'ote ffronithei-finger 69 is carried a plate 82 having-twofeet 83 adapted to bear" againstthe top plate, alternately; the platebeing held in tiltedgpositionwin either direc tion by a spring 84'connected to the plate and to a pin 85. "Thearrangenient-isisuch thatwhen the sha ft -is rocked to the left,

the finger-69 will release the} pawl so that the clutch 65 will be engaged, but when thrown to theVr-ight slightly past centerit will trip"and hold the pawl out of engagement and thus stop the rotation ofthecam 75 asthecra-dle is raised and the brushes are spread-apart.-

' The shaft 8O is actuated by means: lira bracket SS-depending from thetop plate-3 is located a shaft'=87-on' the projecti'ng end of which ispivoted an angular aperture inthegtop plateand into the recess orpassage-111 a shchn'gbar 91. This bar finger 69 which brings the said finlever88, the "lower end of which carries a roller'189 which is so located asto be raised by the core A seated in the cradle. The upper en'd ot'fthe'lever 88 projects through an is' gu'ijtled foiireciprocation by thelever 88, on pin '92;'secured to the top plate and projecting through aslot slain-the bar and also by a plate 109 secured to the-top plate. Thelower end of the lever is-so weighted that when-nocore is 'in the cradlethe ba'r willbe inovedi f the left of Fig. 6. l 5 Pivotally mounted inthe bar 91'is a spring actuated pawl '94, the pointed end-95 0i which isdesigned toengage a tooth-Q6 fornied on the lower side-of a collar=97keyed on the shaft 80 between the bearings 81.

" VVh'en the-roller 89 drops as a core leaves the' cradle, the pawlpasses'to" the -left of the collar 97; and when ia core entersthe-cradle it lifts the" lever gl andcauses the bar 91 t o move to'the-right which rocks 'the" shaft; 80

and the finger 69 so that the clutch is con- 'nected. The "finger.693ren1ains'as-shown in 6 until 'a trip'lever 98" on'the -sideof clutch65 :striles' a cam surface 99 on the er-to apos'itionto disengage theclutchj- "The construction which has nst-"been" described constitutes acomplete devicefor cleaning and discharging a corewlt is necesa sarjghowever, to provide son1e n1eansof detam ng the cores in the 'unway 5until {the machine is ready to operateupon them,

the inac hinecanclean thein. M I For thepurpo'seof holding--back er detainas 'oiten the eoresare- -delivered taster than in'g the cores untilthe cradled; is discharged the; following of the core! containedvtherein; and o'hthen delivering; one core, to itheier'aclle ithe unechasI IllSlIloiJOlEbBTAClGSCIlbBCl is provided andiwhile other ineansmay-b'ei constructed for this pure.

pose5 tl1at sl1own:-herein has beengfound satv z isfactory 'fo'r' the;performance of this wo.rk;:

" Om theushaft-i87 is pivoted an: arm H1011 on ithe: end of which islocated a roller 102 which projects iwithinit'heipath of the! one comingcore qandwillstop it; while the lever is in"lowered. position; but will;release-sit 'uponelevation of the lever.v Pivoted to the leverisan;adjuStable'linklOS which-ispiv oted turnaon a-pin 10 1 on the outerend ofan-arni-lO5i The pin 104jhas .a flattened head; 106- -projectingto e the;,=rightas shown in.-.Fig; ;'Z for a purpose to appearlater;Thear nis bifurcatediaztiitsinherent! and is rece ved on either [side ofa second arinilO'Z, the t'wo arins beingpivotallyfcons ne'cted-itoii'orin a single operatinglever, von

',a'pinw108 inounted'inabracket 1O9-sec-ured I a to theplatei:Thearm:105isprovidedwith-a I lug 110 towhichis pivotally-conneoteda pin-111whic.h is slidably received in a lug:1=12 on the arm 107. A spring113 surrounds the pin 111, the-purpose of which-is to provide a yieldingconnection" between: the two portions of the lever. The end of the arm107 carries a roller 114 which'bears against'a :holdingnieans; to be 1describech 1 was : The -clutch 6 1 lis' operatedi bythe finger -69'wh-ieh is secured to the end of a shaft 117; mounted-to;oscillateinbearings 118, -secu1 ed to the top;plate.;- The shaft' 'llT-isoscillated l v a lever 119,'which is actuated by a vertical pin.,12whieh extendsdownward through the top plate and is connected "to "theaxisj'of a roller 121 which-"is carried on theendof an ar1n122 Theroller121 jorojects' withinthe gpath of the coreA as it'frol'lsf'down therunway 5. The pin 120 'is; arranged to move independently of the lever119, the motionof the roller 121 being-transmitted t'othe lever by acoil spring 124 -'surrounding the" pin and; held between a collar-123E911thepin and the arin of the lever. -Nuts 125 *on' the upper' 'endf i 1 1 20 prevent it fronifalling outof place" ll i One'endef thelever119 is provided-with la tail piece 126 which-bears against the *topplate 1 and I the other end is provided 7 with a tapering 'he'a dil27 which is a rranged tobear upon the upper surface of the slide 91. The endof the slide 91 is inclined as at 128, so that it may enter between thehead 127 and the top plate; The arrangement is such that when the plate91 is at the right hand end of its travel, which occurs when the core isin the cradle, as in Fig. '6, the shaft 117 cannot oscillate and thefinger 69 is in position to hold the clutch in disengagement. If now asecond core enters the machine, it raises the roller 121 and places thespring 124 under compression. At this time the core is detained by theroll- When the first core leaves the cradle 6 the arm 88 is rocked tothe left which moves the plate 91 and, the end 127 of thearm 119dropsdown off the plate 91, under action of the spring 12 1, moving thefinger 69 to the left as shown in Fig. 1, and connecting the clutch 64for a single revolution which raises the roller 102 by operation of thecam 115. Of course, if there is no core in the cradle the arm 119 isrocked by the roller and the core is immediately passed through themachine to the cradle.

In order to prevent the momentum of the core raising the roller 102,means are provided for locking the roller in place. This comprises aslide 129 which is guided for endwi'se movement by a bolt 130 and astrap 131, the left hand end of the slide being provided with a hook 132which passes over the squared end 106 of the pin 105 to hold thecompound lever 105 and 107 in lowered position. The slide 129 is movedby a spring 133'surrounding a pin 134C extending from its rear end andguided in a bracket 135. It is moved in the opposite direction by aprojection 136 on a collar 137 secured to the shaft 117. vIt will beseen that when the clutch 64 is operated to raise the roller 102 thecatch 132 will be withdrawn. Should the catch stick for any reason thejointed construction of the lever for raising the roller will permitrotation of the cam 115 without breaking the lever.

Operation.

The operation of the core cleaning machine will be understood from thedescription which has been given. As the cores roll into the machinedown the runway 5 they will first raise the roller 121, which throughthe clutch 6-1- will raise the barrier 102 permitting the core to enterthe cradle. hen the core reaches the cradle the roller -89 will beraised which will move the bar 91 to the right as shown in Fig. 6. Thiswill rock the finger 69 to permit the clutch 65 to be connected and thecam 75- will Vdraw the brushes together to clean the core VVhen'the cam7 5 rotates so that the cradle is lowered the core will be dischargedand the cradle raised again to receive an-,

other core. At this point, trip lever 98 engages cam 99, causing finger69a to disengage the clutch 65, thus stopping disk 75 in position tohold the cradle in raised position and to allow the brushes to remainspread apart ready to receive the next core. lVhereupon, the sequenceof'movements incident to the receipt of the core upon the cradle willfollow, as given in the above paragraph. I 1

When the roller 89 was raised the end 12 of the bar 91 passed beneaththe end 127, of the lever 119 which action brought the finger 69 back tovertical position and locked the roller 102 down by the catch 132. As anew core enters the machine it is stopped by the roller 102 andprevented from entering the cradle until the first core is discharged,whereupon the bar 91 moves to the left and permits the lever 119 to tripthe clutch 6 1 and the sequence of motion is resumed.

lVhile the description of the various parts has been detailed to enableone skilled in the art to understand the invention, embodiments of theinvention are not restricted to the exact form or arrangement'andequivalent means may be used to accomplish the same results. Suchequivalents as come within the scope of the invention and the appendedclaims are intended to be covered herein.

Claims:

1. A machine for treating tire cores, comprising a structure having apassageway for the cores, a cradle for a core in said passageway, meansto operate upon the sides of the core, said means being movable towardand from the core, power means for actuating said operating means. andmeans actuated by the core in the cradle to control said power means sothat it will move said'first named means toward the core.

2. A machine for treating tire cores, comprising a structure having apassageway for the cores, means in said passageway for holding androtating a core, a brush movable toward and away from the'side of thecore, power operated mechanism for moving the brush, a trip mechanismactuated by the core as it is located in said holding means to controlsaid power operated mechanism so that it will move the brush toward andaway from the core.

3. A machine for cleaning tire cores or similar annular objects.comprising a device for holding and rotating a core, a brush movabletoward and away from the core, power means for moving the brush andmeans actuated by the core for controlling operation of the brush movingmeans where= by it will move the brush toward the core. 7

mam

e; A machine-for elem-11gtire*'c'ores," or simila'r annular' objects,com nsm a cradle r01 holding' and rotatinga core; a "brush movabletoward and *away from the core, a rotatable co'iitrol device 'tor'moving the brush toward and away from the core, actuatin'g 'mea'ns forsaid 1 control 7 deviceand meansftripp'ed by *said core forcentr01==dev1cem operation. "*5.- A==m'achine' foi cleaiiing-tire cores,for

setting the the like, 'coniprising a' coreholding and rotatlng devic'e,a structure'providing a path. tOrFcOresleadmg to said device;a'brushmovable toward' -and away from the core in said idevice,tripping' device in the path-of t-he' core -:to' the device "and"actuated -;tliereby,

a means for moving said brushes toward and away' 'from the' core-amenddevice ,=;po wer ward anaawayr m the core, a-ca'm'toinove fme' ans foroperating the brush moving the tripping device, t Y

i 6f machine for cleaning-tire 'cores,"'com 'iiieansis'aid power meansbeing setin {motion ipri'siiig' means toholdandrotate a core; a fbi'iishmovable-"toward and away from the 7 core, means tomo've*sa1d'brush,"asourceof power, a clutch taweenehe s0arce-orpowe1- and thebrush'moving-means;'andineans actuated by the core "'as it passes thefirst meansf'to operate "saidtlutch for driving're- 7." machine roaem inrire cores, comprising a "core holder; a b'rush" movable tothe "bruslfin thefm'a'nner stated, driving me ansiadapted to be connect ed'to saidcan] torot'atefithes'ame' andmeans to I cause a single operation "iofthecam, said means being adaptedto be actuated iby the presence oi thecorefinthe: holder.

8. Ainzichine' for cle'aning tire cores, comprising cradle, means fordelivering a "core to said cradle, a brushing-device; a support forsaiddevice,'mean*stomove said support.

toward and away from the core, power means to move the support asstated, anda 'trip for said power means operated upon en- 'ment of thebrush away from the core and moving it toward the core, actuating meansadapted to rotate said cam, means forholding said cam stationary withthebrush at its far limit of movement, and means actuated by the core as itenters the cradle to set thecam in motion.

'10; A machine for cleaning tire cores, comprising a cradle, means fordelivering a core to said cradle, brushes movable toward and away fromthe side of the core and ation is "com "1 5 ;.v

aa-mai y ahaiag w move am ase the core, a single de'vic'e -'-forpermitting movement of the brushes away from the corei and-movingthemto'gether toward the core.

said device, "whem'stationary; acting to? perinit 'the brushes to Ispread." apart, power ;means for actuating said device and meansactuated the bore as it "enters"the cradle for :eper tin arhe; "pmvernieans toactuate 'said -"dev1'ce 'to draw the (brushes together againstt'hesides 'offthe core.

, 11.5 111a machine forthepurpose set forth.

a "core rotating means, brushing means norman removed ifr'omflthecoreactuating ineans fand means-operable therefrom for 'automatlc'a'lly="n'iovlng thef brushing 'Ineans rotating fheans'fto bear against thesideof the corefi'f 12. In a machine for thepui'pbseset'torth;

ai-core rotating means, brushing meansf-nor-r mally removed ii'om the'core, f actuating means, "me'ans' opera'ble therefrom "for"automatically? moving the" brushing mea'ns toward the corewhen the corenters the rotat- Jing means, to'bear 'against theside ofTth'e' core, andmeans to {discharge the *core jfrbm the rotating means Whnthe brushingo'per' 113 111 a 'm acliine ar the l p'urpose set forth, a core'rotatingi'n'eans'fbrushing ineans normallyremoved 'fiom the core;actuating 7 means; means operable" therefroin for aura matica'llymovingthe -brushing means"toward th core when the core enters 'tlierotatin'g means, to b ar against the side s ot the Core iir 'rotation,'fand in'e'ans 'to dischar e the I ans-upon completion l of the brushingoperation.

14. In a machine forithe-purpose set forth,

a: ewe rotating means, brushes normallyyre-v moved trom the-core,=-rneans 3 for moving the brushes aawa'r l the core? pow'eameansada ttuated by the core for controlling operation of the movingmeans whereby said mov ing means permits spreading of the brushes anddischarging of the core upon comple v tion'of the brushing operation.

ed to 'rotate'said' moving means, means ac- I i 15. In a machine for thepurposeset forth, 7

amotive means, a cradle for supporting a core and'rotating it, aninclined runway leading to" the cradle, means for tilting the cradle, abrush normally removed from the path of the core, and means adapted tobe 1 connected to the motive means when the core entersvinto the cradletormoving the brush against the side of the core. v

I 16. In a machine for-the purpose set forth,

a cradle for supportinga-core and rotating :it, means to hold the cradlein horizontal position, and tilt it to discharge the core, a brush toclean the side'of the core,

and means acting in timed relation to the the machine, said structureproviding a cleaning station in said passage-Way, a barrier in front ofsaid cleaning station, and means for holding said barrier in thepassageway adapted to be actuated by a core in the cleaning station.

19. In a machine of the character set forth, a structureproviding apassageway along which, a core may travel through the machine, saidstructure providing a cleaning station in said passageway, a barrier infront of said cleaning station, means for holding said barrier in saidpassageway adapted to be actuated by a core in the cleaning station, andmechanism to remove the barrier operable by movement of a core from thecleaning station. a I

20. In a machine of the character set forth, a structure having apassageway along which acore may travel through the machine and acleaning station in said passageway, a barrier in front of said cleaningstation, a mechanism to remove the bar-. rier, and means to preventoperation of said mechanism if a core is in the cleaning station. V

21. In a machine of the character set forth, a structure providing aninclined core passageway and acleaning station at the lower end of thepassageway, a barrier in front of the station, mechanism adapted toremove the barrier, and a trip in the path of the core at the upper sideof the passageway to set said mechanism in operation. I r

In a machine of the character set forth, a structure providing aninclined passageway and a cleaning station at the lower end of thepassageway, a barrier in front of the station, mechanism adapted toremove the .barrier, a trip in the path of the core in front ofthebarrier to set said mechanism in operation, and means to prevent theeffective movement of the trip should there be a core in thecleaningstation.

23. In a machine of the character set forth, a structure providing aninclined passageway and a cleaning station at the lower end of thepassageway, a barrier in front of the station, mechanlsm adapted toremove the barrier, a sprlng actuated trip, means to store energy in thespring actuated by the oncoming core, and means to release that energyto operate the trip upon removal of a core from the cleaning station. I

24. In a machine of the, character set forth, astructure providing apassageway for cores through the machine, a cradle in the passageway,brushes movable'toward and away from a core in. the cradle, means fortilting the cradle to discharge a core,

a barrier in the passageway in front of the cradle, a constantlyrotating shaft, two

clutches on said shaft, a cam rotated by one i of said clutches, saidcam controlling the operation of the brushes and the cradle, a secondcam rotated by said second clutch, said second cam removing the barrier,and means to trip said clutches, said means, be-

ing operated by the core. 7

IVILLIAM G. STEVENS."

